Example Of A Roll-Up Summary Trigger When The Parent Has A lookup Relationship With The Child
Trigger Scenario: The following code example illustrates a Roll-Up Summary Apex trigger that updates the parent object “A__c” when a child object “B__c” is either deleted, inserted, updated, or reparented (parent changed from one record to another). Trigger Functionality: The trigger initiates by defining a set named “parentIds” to store the Ids of the parent …